﻿using System;
using System.Collections.Generic;
using System.Text;
using VSSDKAssist.Assets.ValueProviders.Base;

namespace VSSDKAssist.Recipes.CustomProject.CreateBitmapStrip
{
    public class InstanceValueProvider : ValueProviderBase
    {
        /// <summary>
        /// Contains code that will be called when recipe execution begins. This is the first method in the lifecycle.
        /// </summary>
        /// <param name="currentValue">An <see cref="T:System.Object"/> that contains the current value of the argument.</param>
        /// <param name="newValue">When this method returns, contains an <see cref="T:System.Object"/> that contains
        /// the new value of the argument, if the returned value
        /// of the method is <see langword="true"/>. Otherwise, it is ignored.</param>
        /// <returns>
        /// 	<see langword="true"/> if the argument value should be replaced with
        /// the value in <paramref name="newValue"/>; otherwise, <see langword="false"/>.
        /// </returns>
        /// <remarks>By default, always returns <see langword="false"/>, unless overriden by a derived class.</remarks>
        public override bool OnBeginRecipe(object currentValue, out object newValue)
        {
            newValue = null;

            if((currentValue == null) && (this.ExecutionStage != Stage.OnBeforeActions))
            {
                newValue = Activator.CreateInstance(this.Argument.Type);
                return true;
            }

            return false;
        }
    }
}
